他们是免费的英文

It's very happy for us that we needn't bargain with local TVstation because they willing to give free publicity to it.

学英语还是要靠自己的努力的，英语学习中心只是辅助 这是我的经验 ABC天丅口语性介比不错.好. 每节课都有不同的主题设置 我锻炼了口语 且无形中词汇量也跟着增加了；

免费的：free of charge(短语)免费：free(单词）

They provide us water for free

We are so happy to find out that there is none necessary to bargain with those local TV stations , because they are willing to offer free advertisement.为了帮助楼主选择正确的答案，说明几点：1、delighted 一般用于文学中，很少见的。这里的高兴用happy 或pleasent较好。2、凡是TV stations没有加S都是错的，因为当地电视台可能有很多家。真的只有一家请用：the local TV station，有多家请用those local TV stations楼主懂英语的话请自己觉得使用谁的答案，甚至你可以自己综合多个回答者的答案

what made us delighted is that we don`t have to bargain with local TV station because they are willing to publicize it for free请采纳，可追问，谢谢~

免费free